Boiler-cleaner.



PATENTED APR. 18, 1905.

' T. J. PASCOB.

BOILER CLEANER. APPLICATION FILED NOV. 28,1903.

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UNITED STATES Patented April 18, 1905.

PATENT OFFICE.

BOILER-CLEANER.

SPECIFICATION forming part of Letters Patent No. 787,689, dated April 18, 1905.

Application filed November 28, 1903. Serial No. 182.977.

To (all whom, it Hung "concern:

Be it known that I, THOMAS JOHN PASOOE,

' new and improved boiler-cleaner which is simple and durable in construction, readily applied to any kind of a water-tube boiler, and more especially designed for boring out the scale in the tubes'to render the tubes perfectly clean in a comparatively short time.

The invention consists of novel features an parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the inventionis represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the Views.

Figure l is a sectional side elevation of the improvement as applied. Fig. 2 is an enlarged face View of one of the bearings for the feedscrew, the latter being shown in section. Fig. 3 is an enlarged sectional side elevation of the feed-screw, the bore-hole, and one of the feedscrew bearings. Fig. 4 is an enlarged face view of the feed-nut. Fig. 5 is an enlarged transverse section of the feed-screw on the line 5 5 of Fig. 6, and Fig. 6 is a longitudinal sectional elevation of the same.

The boring-tool A for boring the scale out of a boiler-tube B is flexibly held on the head C of a feed-screw C, having a longitudinal keyway C engaged by a key D in a sleeve D, mounted to turn in suitable bearings ar' ranged in the support E of the machine. The sleeve D carries at one outer end a gear-wheel F in mesh with a pinion F, secured on the shaft Gr of a motor G of any approved construction, so that when the motor is in action the pinion F and gear-wheel F impart a rotary motion to the sleeve D, which by its key D imparts a rotary motion to the feed-screw C to turn the boring-tool A in the boilertube B.

In order to feed the feed-screw C longitudinally, a nut H is provided, having handles H, adapted to be taken hold of by the operator to hold the nut stationary while the feed-screw C is revolved to cause the latter to travel in the direction of its length.

The boring-tool A is provided with longi- .longitudinally-elongated slots C, formed in the head C to allow the boring-tool A to flex sufficiently to readily accommodate itself in tubes B, which may be warped by the heat.

In order to properly guide the feed-screw C in a tube B. bearingsI are provided, each made in sections hinged together and fastened at their free ends by a pin, each bearing being fitted loosely onto a reduced portion 0 of the feed-screw C. Any desired number of such bearings I may be employed throughout the length of the feed-screw, so as to give the lat ter the desired bearing while passing through a long tube B. It is understood that the hearing I is placed in position on the reduced portion C after the latter has passed the feed-nut H and previous to the entrance of the reduced portion and the bearing thereon into the boilertube.

The feed-screw C is preferablymade in sections, as more fully shown in detail in Figs.5 and 6, each section having one end formed with a reduced pin C engaging a corresponding aperture in the adjacent end of the next following section, and in the pin C is held to slide a locking-pin C, adapted to enter an opening O in the adjacent section. A spring C presses the locking-pin C to hold the same in engagement with the opening C Now when the pin 0 is engaged with the corresponding opening in the adjacent feed-screw section then the locking-pin C finally snaps into the opening 0 to lock the sections together and to render the thread of the feed-screw continuous.

In order to properly guide the pin C to bring the locking-pin C in register with the opening G a pin C is provided, engaging the l the boring-tool A, always in the proper posilongitudinal groove in the pin C (See Fig. 5.)

In boiler-rooms it is very desirable that the feed-screw C be made in sections, as usually not sufficient space is had between the front of the boiler and the adjacent wall of the boilerroom to accommodate long screws, and by making the feed-screw in sections one section after the other can be placed in position, as the boring-tool A advances further in the boiler-tube B. In a like manner when the boring-tube A is run backward out of the tube the sections can be removed, and hence the device does not take up very much room and can be advantageously used in a crowded boilerroom.

The support E is adjustably held on a transverse bar J, having sleeves J at its ends fitted loosely on vertical screw-rods K, on which screw nuts L for supporting the sleeves J". The screw-rods K are attached to brackets N, adapted to be secured to the boiler-frame, as indicated in Fig. 1. As shown, the support E is clamped to the bar J to allow of shifting the support transversely and to swing it, to bring the feed-screw G into proper axial alinement with the tube B to be cleaned, and when the support E is in the proper position clamping-screws J 2 for a clam ping-cap J are screwed up to securely fasten the support E in position on the cross-bar J. When this has been done, the motor G is started, so as to rotate the feed-screw (1, which is now fed forward by the operator holding the feed-nut H stationary, so that the boring-tool A passes into the tube B and rotates therein, so as to cut off the scale, it being understood that the external diameter of the boring-tool corresponds approximately to the inner diameter of the boiler-tube.

One of the bearings I is mounted on the reduced portion (1 adjacent to the head 0, and as the said bearing I travels in the cleaned portion of the tube it is evident that said bearing holds the feed-screw, and consequently tioili for the boring-tool to do its work effectwe y.

In case the boring-tool A should stick in the scale it is only necessary for the operator to momentarily release the nut H, so as to stop feeding the feed-screw until the boring-tool becomes sufliciently loosened to allow it to proceed further in the tube for boring out the scale therein. 1

The feed-nut H is preferably made in sections hinged together and fastened together at their free ends by a pin, so as to allow of readily placing the nut H in position on the feed-screw C or to permit of removing the feed-nut whenever it is desired to do so.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A boiler-cleaner provided with a sectional feed-screw having reduced blank portions, means for removably connecting the sections with each other, to render the thread continuous, and bearings made in parts and adapted to be fitted on said reduced blank portions of the feed-screw, as set forth.

2. A boiler-cleaner, comprising a support, a sleeve mounted to turn in the support and held against longitudinal movement therein, gearing for rotating the sleeve, a feed-screw mounted to slide back and forth in the sleeve and to be rotated thereby,a handle-nut through which the screw passes, said nut being adapted to be held stationary to permit the screw to be fed lengthwise, a tool on the end of the screw, reduced blank portions on the screw between the feed-nut and the head, and bearings made in parts and fitted on said blank portions.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS JOHN PASCOE.

Witnesses:

JOSEPH ROWE, -CHARLES HAGBERG. 

